Cutting-off machine



Feb. 22, 1944. F, F. BRUECKNER CUTTING OFF MACHINE Filed Jan. 6, 1943 4Sheets-Sheet 1 ec fker.

4M A TTORNE Y5.

1944. F. F. BRUECKNER CUTTING OFF MACHINE Filed Jan. 6, 1943 4Sheets-Sheet 2 INVENTOR ATTORNE Y Feb. 22, 1944.

F. F. BRUECKNER 2,342,246

CUTTING OFF MACHINE Filed Jan. 6, 1943 4, Sheets-Sheet s E i g .9/ .90/d2 I ///////i/7////zz// M] E IN VEN TOR 5////// BY fr' ki lf'z Cl r rFeb. 22, 1944.

F. EBRUECKNER CUTTING OFF MACHINE Filed Jan. 6, 1943 4 Sheets-Sheet 4 Ma A 7 /54 4, M in /$3" 'INVENTOR rwrael'z tl 7? Braeahzer: W BYATTORNEYS Patented Feb. 22, 1944 CUTTING-OFF MACHINE Frederick F.Brueckner, Detroit, Mich., assignor to William R. Wilson, Detroit, Mich.

Application January 6, 1943, Serial No. 471,400 13 Claims. (01. 164-62)The invention relates to metal cutting machines and it has particularrelation to a machine for cutting metal bands from a metal tube.

In the manufacture of metal bands adapted for use on gun shells, it isusual practice to cut the tube inwardly from the outside and, as aresult of this procedure, it is very difiicult to avoid leaving burrsalong the inner edges at both ends of the band. Since these bands areapplied in grooves formed in the shells, it is quite important that theinner surface of the band be free from such burrs so as to obtain aclose, smooth surface fit with the bottom of the shell groove and avoidthe possibility of gas leakage past the band. Accordingly, when the tubeis cut inwardly from the outside, additional operations must beperformed on the band after it is grooved in order to remove the burrs.

n the other hand, it is not so undesirableto have burrs at the outerside of the band for the reason that the band when applied is usuallyshrunk into the groove and then the outer surface is machined in orderto obtain the final, accurate outside diameter. This final machiningoperation necessarily would remove any burrs on the outer side of theband.

Various types of machines may be used in cutting bands from a tube, suchas hand operated machines of various types, and certain types ofautomatic screw machines. the latter type may be employed for cuttingbands from a tube, ordinarily the machine is large, requiresconsiderable space, and in general is not efficient for band cuttingoperations. comparatively speaking, a machine of the automatic screwtype is more eflicient for work generally done on automatic screwmachines and if used for cutting bands from a tube, full and efiicientuse of the machine is not obtained.

While hand-operated machines have been used for cutting bands, oneprincipal objection, aside from the burr factor, is that the machinesare not efiicient and the volume of production is small. Thisnecessarily increases the cost and at the present time when the volumeof bands needed is considerable, improvements which would simplifymanufacturing operations, increase production, and therefore decreasecost, are decidedly important.

One object of the present invention is to pro- Vide a shell band cuttingmachine which will automatically and efficiently cut the bands from thetube in successive andautomatic operations While machines of throughcutting of the tube outwardly from the 1 inside.

bolts l4. As illustrated in Figure Another object of the invention is toprovide a shell band cutting machine of the character indicated whichwill allow for adjustments so that bands may be cut from tubes ofvarying diameters and wall thicknesses.

Another object of the invention is to provide an automatic shell bandcutting machine which is very small so that its cost of manufacture willbe minimized and so that very little space will be required foraccommodating it.

Other objects of the invention will become apparent from the followinspecification, from the drawings relating thereto, and from the claimshereinafter set forth.

Figure 1 is a plan view of a shell band cuttin machine constructedaccording to one form of the invention;

Figure 2 is a side elevational view of the machine shown by Figure 1;

Figure 3 is an end View of by Figure 1;

Figure 4 is a detail View on a larger scale of that portion of themechanism located in the dotted circle X of Figure 1;

Figure 5 is a cross-sectional view taken substantially along the line5-5 of Figure 1;

Figure 6 is a cross-sectional view taken substantially along the line6--B of Figure 1;

Figure 7 isa cross-sectional view taken substantially along the line'l-| of Figure 1;

Figure 8 is a layout view illustrating one of the cams;

Figure 9 is a similar layout View illustrating another cam in themachine; and

Figure 10 is a modified view illustrating another form of means forgripping the tube.

Referring to Figures 1, 2 and 3, the machine has a base I0 upon whichsubstantially al1 parts are supported and at one end, as seen in Figure2, a driving shaft H is journalled in bearings l2 and I3 fastened to thebase such as by machine 1,a motor 16 may be connected to one end of theshaft I l for driving it. Adjacent the bearing l3, a spiral gear I! isdrivingly secured to the shaft H by means of a set screw it and thisgear meshes with a spiral gear l9 which is similarly secured to a crossshaft 20.

As best shown by Figures 1 and 2, the cross shaft 20 is rotatablysupported in spaced bearings 2i and 22 which are secured to the base ll?by machine bolts 23. Still referring to Figures 1 and 2 in particular, arelatively long gear 25 is fastened by a set screw 26 to the shaft 20adjacent the bearing 22, and this gear meshes with a gear the machineshown 2?. The latter is keyed to the sleeve 28 by means of diametricallyopposed keys 29 and 3b which so fit keyways in both the gear and sleevethat normally the gear is held against axial movement on the sleeve. Thesleeve is rotatable on a pin SI secured in a slide 32 by means of a setscrew 33 and in order to provide a good bearing between the sleeve andpin, bearing sleeves 34 and 35 are disposed between the sleeve 28 andthe pin and are sufiiciently press fitted on the pin so as to maintaintheir axial positions shown while permitting the sleeve 28 to rotate ontheir outer bearing surfaces. The sleeve 28 and pin 3! are retained inassembled relation by a head 31 on the end of the pin opposite the slide32 and this head engages a bearing washer 38; which, in turn, hasbearing contact with the end of the sleeve 23.

At the opposite end of the'sleeve 28, a'second bearing washer M isprovided between the side wall of the gear 2! and the slide 32. The pin3i at its end opposite the head 31 projects from the slide 32 and hasathreaded portion 52 which is threaded into a collar 43 fastened to theslide by means of screws 44. A look nut 45 on the end of the sleevelocks the pin rigidly to theslide 32. 7 Now referring to Figure 3, theslide 32is slidably mounted on the base it by means of a channelway 5ireceiving the T-portion of a guideway 5I fastened to the base Iii byscrews 52. For holding the slide on the guideway, side plates 53 and 54fastened to the slide by means of screws 55 overlap the side portions ofthe guideway.

From the description so far given now, it should be understood that theslide 32 may move along the guideway 5i, and that during this movementthe gear 2? will remain in engagement with the driving gear 25 due tothe length of the latter.

Referring now to Figures 1,4, and 5 in particular, the end of the sleevezl'l adjacentthe head it! on the pin 3I is threaded into a centralopening 57 of a disc or head 58 and for rigidly holding these partsconnected, the sleeve and disc are welded around the end of the openingin the disc as indicated at 65]. It may he noted that the opening in thedisc hasa smooth or cylindrical portion 65 which receives the washer 38and head 3'! on the pin, although it is to be understood that the disccan rotate freely with respect to the head.

As bestshown byFigures 2 and 5, the head 58 has a slideway on itsaxially outer side and this slideway is formed by means of plates 53 andM which are secured to the disc by means of screws 65. Adjacent, taperededges so and ti on the plates E53 and E i, respectively, retain a crossslide 6%; having similarly shaped edges, and this cross slide is sodisposed as to move diametrically of the axis of rotation. At'itscenter, the cross slide 68 has a lrey or rib l which fits acorresponding recess a cutterhead II secured to the cross slide by meansofscrews I2. The-key or rib I0 serves as a drivin connection between thecross slide and cutterhead so as to avoid torque driving loads on. thescrews '72. The cutterhead at its outer side has a' pinportion E onwhich a cutter i3 is secured by means of a nut 74.

As best shown by Figure 5; the cutter I3'is notched out at one point asindicated at IS to provide'a cutter edge or tooth M. It will. beappreciated that the singularity of the notch readily allows sharpeningof th cutting edgeand that the amount of material in the cutter permitsrepeated sharpenings, thereby providing long life for the? cutter.

As best shown by Figures 1, 2, 4, and 5, the cross slide 68 is urgedradially in one direction by a pair of coil springs 8i! and GI locatedin openings 82 and 33 in the cross slide and which have their outer endsabutting a cap 84 secured to the disc 56 by screws 85. Dowel pins 88 and8'1 at circumferentially opposed edges of the cap 84 positively locateit in proper position.

Movement of the cross slide 68 in the opposite radial direction, thatis, against the action of the springs 85) and 8 I, is eifected by meansof an arm 8'! extending through a slot 88 in the disc 58 and which ispivoted in such slot on a pin 89 disposed in a transversely extendingopening in the disc. This arm has a rounded end 96 projecting into alarger slot 9| in the cross slide 63 and from this it follows that ifthe arm is pivoted in one direction about the axis of pin 89, the crossslide will move radially against the action of the springs whereas, ifthe arm is allowed to move in the opposite direction, the springs willmove the cross slide in the opposite radial direction,

For movingthe arm 81 in a direction opposing the action ,ofthe. springsand BI, referring now to Figures 1 and 4, collar 94.is slidable on thesleeve 28 and has keyways receiving the keys 29 and 30, sov that thecollar rotates with the sleeve whilelbeing slidable thereon. This collarhas a notch at one point providedwith a tapered seat 95 andthisseatengages. a rounded end 96 at the end of the arm, 81 opposite theend 93. It will. be apparent that when the collar 94 shifts to theright, the arm 87 willpivot in such manner as to move the cross slide 68against the action of the springs as and BI. The collar 9! is adapted tobe moved by a. slide. I having a central ring portion IBI whichrotatably embraces a cylindrical portion I02 of the collar 94. Bearingwashers I03 and I Mare disposed at opposite. sides of the. ring and thewasher I53 is maintainedfsubstantially against a shoulder I05 at one endof the cylindrical portion I03 by a nut Ill'l'threaded one-smaller endI08 of the collar and which substantially contacts. the washer I 04.

As best shown by Figures 1 and 5, the slide I00 has a channel shapedgroove I II) which slidably receives a bar III. A plate IIZ secured tothe slide by screws H3 closes the open side of the channel so as toprovide a rectangular opening substantially but slidably fitting thebar.

With particular reference now to Figures 1 and 2,,the bar III extendsinto and seats in a channel shaped slot II5 in the slide 32.. Screws H6rigidly secure the bar to the slide, and from this it follows that theslide I00 is held against rotation, about the axis of thesleeve 28 byits sliding engagement with the bar.

For advancing the cutter I3 axially so as to move it into a tube to becut, a cam In is provided and this, cam is secured to a shaft IZI by setscrews I22. TheshaftIZI is journaled in spaced bearings I23, I24 and I25secured by screws to the; base Illand that end of the shaft adjacent theshaft I I has a spiral gear I 25 which meshes with the spiral gear I 21fixed on the shaft II so that rotation of the latter causes rotation ofthe shaft I2I.

The cam I20 has a cam groove I23 which-cooperates with acam roller I29rotatable on a stud I30 which has a threadedend I3I threaded into thebar III. It may be briefly stated at this point that as the cam I28rotates, the slide 32 will be advanced so as to move the cutter into thetube and then no axial motion of the cutter will occur for apredetermined length of time and then the cam and cam groove will effectaxial withdrawal of the cutter from the tube.

For moving the cutter radially, or, in other words, for moving the slideI!) against the action of the springs 80 and 8i, 2. second cam I32having a cam groove I33 is similarly secured to the shaft and the grooveco-operates with a roller I34 mounted on a stud I35 which is secured tothe plate H2. The contour of the groove I33 is such that after advanceof the cutter into the tube, the cutter will be gradually moved in aradially outward direction so as to cut through the wall of the tube andsever a band therefrom. After the cutting action, the cutter iswithdrawn radially and this occurs prior to axial withdrawal of thecutter. ence with respect to the action of these parts of the machinewill be made presently.

Now referring to Figures 1 and 6, means for supporting a tube I31 to besuccessively cut comprises a supporting block I38 embracing a T- shapedslideway I38 and which is slidably retained on the latter by side plates,MO and Hi secured by screws I42 to the block. This block at its upperside has an angle member I42 slidable thereon and guided by a key I43and for adjustably holding the member in position, bolts I44 passingthrough an elongated slot in the member are threaded into the block. Avertical serrated surface 143 on the member is adapted to engage thetube. At its lower side, the tube rests on a bar insert I41, and bychanging the height or thickness of the insert and the position ofmember I42, the position of the pipe may be varied and this is desirableparticularly where different diameters of pipe are to be cut. Figureshows a modification of this character where the insert indicated at I43is substantially thicker and it will be noted that the tube in this casemay be substantially smaller in di ameter without substantially changingthe location of the axial center line.

For clamping the tube in the position shown, a slidable element I49 isprovided and this element has a tapered, serrated surface Hill adaptedto contact the tube. The element slides on the upper surface of theblock I38 and is guided between vertical portions I5I and IE2 (seeFigure 1) of the block while a plate I53 secured by screws I54 to suchportions holds the element in posit on while permitting its lateralsliding. It might be noted at this point that both the member I42 andthe element Hi9 have vertical slots indicated at I56 and E51,respectively, and these slots permit the cutter to go through the tubewithout interference at the outer side of the tube.

The element I49 is moved towards the tube by a cam I58 secured to theshaft i2! and this cam engages a cam follower Hill sl dable in anopening IEI in the element I48 and which has a smaller extension I82slidable in a smaller opening I63 in the element. A compressed sprin I64is provided in the larger opening It! between the cam follower and theelement. although, under certain circumstances. it might be desired tohave the cam follower solid with the element. The major portion of thecam sur face is adapted to hold the element, clam ed against the tubebut a relief H55 in the acts to release the clamping pressure so thatthe tube may be axially advanced. It is to be observed in connectionwith Figure l in particular that this tube clamping means will hold thetube Further ref er-- at both sides of the notches I56 and I51 so thatduring the cutting operation, th band being cut off is also held.

After the tube is cut and the cutter is withdrawn radially, the tube isadvanced axially a definite amount preparatory to a successive cuttingoperation, and for accomplishing this advancing of the tube, camactuated means are employed which will now be described. This meansgenerally includes a slide I61 shown by Figures 1 and '7 which isslidably mounted on a T-shaped slideway I68 and is retained thereon byside plates I69 and I10 secured in turn to the slide by screws I1 IClamping means similar to that already described includes a clampingelement I12 similar to the clamping element I42 and a clamping elementI13 slidable in a bracket I14 having a channel portion receiving suchelement I13. Screws I15 hold the bracket on the slide and a plate I16closes the upper side of the channel. Movement of the element I13 iseffected by a cam follower I11 engaging a cam I18 secured to the shaftI2I. It might be mentioned here that the cam I18 has a relief I19 toallow release of the clamping means at a predetermined time. 7

Axial movement of the slide IE1 is effected by means of a cam roller Ifastened to the upright part of an angular element I8I fastened by boltsI82 to the slide I51. This roller engages a groove 83 in a roller I84fastened to the shaft I2I.

Figures 6, 7, and 9 generally show the relation of the two camsoperating the two tube clamping means and the cam i8 which cooperateswith the roller I89. The relation of these cams is such that during thecutting operation, both clamping means hold the tube and the cam rollerI80 is moving through the straight part of the cam groove I83. As soonas the cuttingoperation is completed, the clamping means actuated by camI18 releases and at the sam time the cam groove I83 and roller I80 actto shift the slide I31 to the right as seen in Figure 1.

When the cam roller I80 reaches the bottom of this jog in the camgroove, the second clamping means again acts to clamp the tube and atthesame time the first clamping means releases. Then, as the roller I89moves along the opposite incline in the jog I35 in the groove, the tubeis advanced a definite and predetermined amount preparatory to cuttingthe second band from the end of the tube. The cut-off band in themeantime is pushed out and falls vertically below the first clampingmeans and thus the tube can move into position for the second cuttingoperation. It might be mentioned here that the block I38 is suitablyopen below the band being cut off so as to allow it to fall out and intoa receptacle or chute.

The entire operation is synchronized and while perhaps already generallyunderstood. the total operation will now be briefl set forth.

With the tube in position clamped by both tube clamping means, the camroller I29 in groove I28 acts to advance the cutter into the tube apredetermined amount. After the cutter has been advanced into the tube,the second cam I34 acts to advance the cutter radially in a gradualmanner so as to effect the cutting operation. As soon as the cutter hascut through the wall of the tube, the springs 8i! and iii retract thecutter radially and it might be mentioned at this point with referenceto Figure 9 that the cam groove I33 has a relief I81 to allow thesprings to quickly retract the cutter to a point Where it will at leastclear the inner surface of the tube. As soon as the cutter is thusretracted, it begins to withdraw axially from the tube. At the sametime, the clamping means operated by the cam I18 releases and cam I84acts to move the slide 16'! to the right as seen in Figure 1 apredetermined distance, and then the cam I18 operates to again cause thesecond clamping means to engage the tube. Just before the slide it!begins to shift to the left, the cam I58 acts to release its clampingmeans so as to allow advancing of the tube and dropping of the cut-onband out of the machine. Then the tube is advanced to its new positionand after completion of the advance, the cam I58 causes the firstclamping means to again clamp the tube preparatory for a second cuttingoperation. In the meantime, the

cutter withdraws axially from the tube and returns following advance ofthe tube. It will be observed generally that once a tube is inserted inthe machine, bands will be automatically and rapidly cut from the tubeand that the cutting operation is efiected from the inside outwardly.

Various cams, cutter heads, andother parts such as the inserts M5 andH58, may be employed for varying the length of band out and foradjusting the mechanism to accommodate different diameters of tubes.Altogether, it should be apparent that the different parts of themechanism ma be adjusted or that parts ma be changed as mentioned, sothat tubes varying in diameter ma be accommodated and so that bands ofvary ing lengths and varying diameters may be produced.

Although only one form of the invention has been illustrated anddescribed in detail, it will be apparent to those skilled in the artthat various modifications may be made without departing from the scopeof the appended claims.

What is claimed is:

1. A machine for successively cutting bands from a tube by cuttingoutwardly from the inside thereof, a rotar cutter, means for rotatingthe cutter, automatically operating means for advancing the cutteraxially into the end of the tube and after a predetermined time ain'allywithdrawing the cutter from the tube, automatically operating meansacting during said predetermined time to move the cutter radiallyoutwardly so as to cut through the tube and then to retract the cutter,means for holding the tube, and automatically operating means foradvancing the tube following each cutting operation.

2. A machine for successively cutting bands from a tube by cuttingoutwardly from the inside thereof, a rotar cutter, means for rotatingthe cutter, automatically operating means for advancin the cutteraxially into the end of the tube and after a predetermined time axiallywithdrawing the cutter from the tube, automatically operating meansacting during said predetermined time to move the cutter radiallyoutwardly so as to cut through the tube and then to retract the cutter,and automatically operating means for holding the tube and cut-off banduntil the cutter is withdrawn from the band and then releasing the band.

.3. A machine for successivel cutting bands from a tube by cuttingoutwardly from the inside thereof, a rotary cutter, means for rotatingthe cutter, automatically operating means for advancing the cutteraxially into the end of the tube and after a predetermined time axiallywithdrawing the cutter from the tube. automatically operating meansacting during. said predetermined time to move the'cutter radiallyoutwardly so as to cut through the tube and then to retract the cutter,and means automatically operable for holding the tube and cut-01f banduntil the cutter is Withdrawn from the band, then releasing the band,and then for advancing the tube a predetermined amount preparatory tothe next cut-- ting operation.

4. A machine for successively cutting bands from a tube by cuttingoutwardly from the inside thereof, a rotary cutter, means for rotatingthe cutter, automatically operating means for advancing the cutteraxially into the end of the tube and after a predetermined time axiallwithdrawing the cutter from the tube, automatically operating meansacting during said predetermined time to move the cutter radiallyoutwardly so as to cut through the tube and then to retract the cutter,means automatically operable for gripping the tube during the bandcutting operation and for releasing it after such operation, and meansautomatically operable for advancing the tube between band cuttingoperations.

5. A machine for successively cutting bands from a tube by cuttingoutwardly from the inside thereof, a rotary cutter, means for rotatingthe cutter, automatically operating means for advancing the cutteraxially into the end of the tube and after a predetermined time axiallywithrawing the cutter from the tube, automatically operating meansacting during said predetermined time to move the cutter radialloutwardly so as to cut through the tube and then to retract the cutter,means operable for grippin the end portion of the imbe including theband to be cut off, means including tube gripping means for advancingthe tube after release of the first gripping means and after release ofthe cut-ofi band, and means automatically governing the gripping andtube advancing means so that they operate in sequence and in synchronismto the operation and movements of the cutter.

6. A machine for successively cutting bands from a tube by cuttingradially outwardly from the inside thereof, comprising means for holdingthe tube, a rotary cutter, means for rotating the cutter, cam actuatedmeans for advancin the cutter axially into the tube and withdrawing itaxially after a predetermined time, and cam actuated means operatinafter such advance of the cutter into the tube for moving the cutterradially outwardly to eifect the cutting operation on the tube and thenfor moving the cutter inwardly to retracted position, the last mentionedcam means being of such character as to effect slow, progressive outwardmovement of the cutter to efiect cutting 01- the band and then to effectrapid retraction movement of the cutter.

7. A machine for successively cutting bands from a tube by cuttingradially outwardly from the inside thereof, comprising means for holdingthe tube, a rotary cutter, means for rotating the cutter, cam actuatedmeans for advancing the cutter axially into the tube and withdrawing itaxially after a predetermined time, means for moving the cutter radialloutwardly and for retracting it inwardly, and means controlled by theaxial position of the cam actuated mean for determining the initialradially outward movement of the cutter.

8. A machine for successively cutting bands from a tube by cuttingradially outwardly from the inside thereof, comprisingmeans for holdingthe tub a slide, a rotary cutter mounted on the slide and being radiallymovable thereon, means for rotating the cutter, cam operated means formoving the slide so as to advance the cutter into the tube, a secondslide on the first slide, means on the second slide for effecting radialoutward movement of the cutter depending upon relative movement of theslides in one direction, and cam means for effecting the movement of thesecond slide in said one direction relative to the first slide.

9. A machine for successively cutting bands from a tube by cuttingradially outwardly from the inside thereof, comprising means for holdingthe tube, a slide, a rotary cutter mounted on the slide and beingradially movable thereon, means for rotating the cutter, cam operatedmeans for moving the slide so as to advance the cutter into the tube, asecond slide on the first slide, means on the second slide for eifectingradial outward movement of the cutter depending upon relative movementof the slides in one direction, cam means for effecting movement of thesecond slide in said one direction relative to the first slide so as tocause outward movement of the cutter, spring means for retracting thecutter inwardly after the band cutting operation, and means on the lastmentioned cam means for releasing the second slide for reversed movementby the spring means after the cutter has completed its outward cuttingmovement.

10. A machine for successively cutting bands from a tube by cuttingradially outwardly from the inside thereof, comprising means for holdingthe tube, a slide having a pin projecting therefrom, a tubular, rotarysleeve on the pin, means for rotating the sleeve while permitting itsmovement with the slide along the axis of the sleeve, a head on one endof the sleeve, a cutter, means mounting the cutter on the head so thatit can be moved radially inwardly and outwardly, spring means on thehead for moving the cutter in one radial direction, a collar rotatablewith and slidable on the sleeve, cooperating means on the head andcollar for effecting radial movement of the cutter in the other radialdirection when the collar moves along the sleeve in one direction, cammeans for moving the first slide so as to advance the cutter axiallyinto the tube, and cam operated means for moving the collar so as tomove the cutter radially against the action of the spring means afterthe cutter advances into the tube.

11. A machine for successively cutting bands from a tube by cuttingradially outwardly from the inside thereof, comprising means for holdingthe tube, a slide having a pin projecting therefrom, a tubular, rotarysleeve on the pin, means for rotating the sleeve while permitting itsmovement with the slide along the axis of the sleeve, a head on one endof the sleeve, a cutter, means mounting the cutter on the head so thatit can be moved radially inwardly and outwardly, spring means on thehead for moving the cutter in one radial direction, a collar rotatablewith and slidable on the sleeve, cooperating means on the 5 head andcollar for efiecting radial movement of the cutter in the other radialdirection when the collar moves along the sleeve in one direction, asecond slide, means operatively connecting the collar and second slideto permit rotation of the latter while it is axially moved by suchslide, cam means for moving the first slide so as to advance the cutteraxially into the tube, and cam means for moving the second slide so asto move the cutter radially against the action of the spring means afterthe cutter advances into the tube. 12. A machine for successivelycutting bands from a tubular member by cutting outwardly from the insidethereof, a cutter member, means for rotating one member about the axisof the tubular member, automatically operating means for moving onemember along said axis and relative to the other member first to advancethe cutter member into the end of the tubular member and then after apredetermined time to retract the cutter member from the tubular member, automatically operating means for shifting one member relative tothe other radially of said axis between the advance and retraction ofthe cutter member so as to effect outward cutting off of a band from thetubular member and then inward withdrawal of the cutter member, andmeans for axially advancing the tubular member a predetermined amountafter each cutting operation so as to enable cutting successive bandsfrom the tubular member.

13. A machine for successively cutting bands from a tubular member bycutting outwardly from the inside thereof, a cutter member, means forrotating one member about the axis of the tubular member, automaticallyoperating means for moving one member along said axis and relative tothe other member first to advance the cutter member into the end of thetubular member and then after a predetermined time to retract the cuttermember from the tubular member, automatically operating means forshifting one member relative to the other radially of said axis betweenthe advance and retraction of the cutter member so as to effect outwardcutting off of a band from the tubular member and then invyg dwithdrawal of the cutter member, means for holding the cut-offbandduring the cutting operation and during axial retraction of thecutter member and then releasing the band prior to the next advance ofthe cutter member, and means for axially advancing the tubular member apredetermined amount after each cutting operation so as to enablecutting successive bands from the tubular member. 60

FREDERICK F. BRUECKNER.

